#257D83
Closest named color: Teal (#008080). oklch(54.2% 0.081 201.7), rgb(37, 125, 131).
Aa
White text reads best on this color (4.83:1).
About this color
#257D83 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.081 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.016 away. White text reads best on it, at 4.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.33:1 |
| White text | 4.83:1 |
Values
| HEX | #257D83 |
| RGB | rgb(37, 125, 131) |
| HSL | hsl(184, 56%, 33%) |
| OKLCH | oklch(54.2% 0.081 201.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #257D83 | 4.83:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #257D83 | 4.33:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #257D83 text on white | 4.83:1 | AA | Lc 73.2 | Content text, not long reading |
| #257D83 text on black | 4.33:1 | AA large text | Lc -28.4 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A6C8CA
oklch(80.9% 0.036 200.9)
-
Step 400
400
#75ACB0
oklch(70.8% 0.058 201.7)
-
Step 500
500
#4D979C
oklch(63.1% 0.074 201.3)
-
Step 600
600 (this color)
#257D83
oklch(54.2% 0.081 201.7)
-
Step 700
700
#1B6D73
oklch(49.1% 0.075 202.3)
-
Step 800
800
#1A595D
oklch(42.7% 0.062 201.2)
-
Step 900
900
#1D494C
oklch(37.6% 0.048 201.4)
-
Step 950
950
#122B2D
oklch(27% 0.031 202.3)
#257D83 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #737783 | 0.081 |
| Deuteranopia (no green cones) | #666D83 | 0.076 |
| Tritanopia (no blue cones) | #00827F | 0.021 |
| Achromatopsia (no color) | #727272 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257D83
#257D83
oklch(54.2% 0.081 201.7)
- #995C5A
#995C5A
oklch(54.3% 0.081 22.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #257D83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.016
- Deep Aqua #08787F ΔE 0.021
- Bluegreen #017A79 ΔE 0.023
- Ocean #017B92 ΔE 0.028
- Deep Turquoise #017374 ΔE 0.040
- Dark Cyan #008B8B ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.042
- Teal Blue #01889F ΔE 0.046
Use #257D83 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.